Love that giddy thrill of expectation you get whenever your computer 'dings' or 'dongs' to alert you to new email? (You know, the one that comes before the crushing blow that your new message isn't an offer for your dream job, but just more SPAM?) Wish you could translate that little lift into your everyday life? Or do you just hate running to the mailbox every 20 minutes when your expecting something? Then POSTIN is for you.
POSTIN uses a radio transmitter (on the mailbox) and receiver (in the home) to alert you when mail (the old-fashioned, envelope and stamp sort of mail) has arrived in your mailbox. Alas, it can't warn you in advance if it's just all adverts and bills. -[Star C. Foster]
From: Five reasons Foursquare will be this year's Twitter